To prepare for the Chaldea Summer Adventure rerun, you'll need efficient farming teams equipped with drop rate and damage bonus Craft Essences like Ocean Flyer and Sink Deeper. Focus on clearing the event ladder and farming pseudo lottery nodes to acquire materials like seashells and treasures crucial for servant ascensions and skill upgrades.
Understanding the Pseudo Lottery Mechanics
The Chaldea Summer Adventure rerun is not a traditional lottery event. Instead, it uses pseudo lottery mechanics where farming treasure chest nodes yields specific skill and ascension materials. Items like seashells, fruits of longevity, and comet shards can be farmed directly.
While this event lacks gems, mana prisms, and QP rewards commonly found in standard lotteries, it provides targeted material drops tailored toward summer servants' needs. If you need these items for upcoming servant skills or ascensions, prioritize farming nodes that align with your material requirements.
Key Preparations for Farming Efficiency
Efficient farming in this event requires the right setups.
prerequisites
- Craft Essences: Using Sink Deeper increases treasure chest drop rates, while Ocean Flyer boosts event damage for Arts attackers.
- Servant setups: Prioritize high-damage servants for handling pseudo lottery challenges effectively.
- Support options: Borrow strong support servants equipped with event Craft Essences to maximize farming efficacy.
You should aim to limit break Sink Deeper for optimal performance if you participated in the event's initial run. If not, borrow these from your support list to secure a 100% chest drop rate boost.
90++ Node Mechanics and Strategy
This rerun introduces a 90++ node with tough challenges:
Experiment with compositions leveraging Ocean Flyer for damage boosts, event units like Summer Ibuki or Artoria, and Summer Castoria's synergy against Sitonai. Budget team slots for necessary Sink Deeper copies while balancing damage and charge requirements.
Acquiring and Utilizing Event Craft Essences
Ocean Flyer and Sink Deeper are the key Craft Essences from this event:
- Sink Deeper boosts treasure chest drops significantly and should be max limit broken if possible.
- Ocean Flyer is invaluable for Arts attackers and serves as a strong free-to-play alternative to premium damage options like Black Grail.
Earn these Essences through the event ladder or exchanges, ensuring your farming teams are well-equipped.
Unlocking and Enhancing Ruler Da Vinci
The welfare servant of this event, Ruler Da Vinci, can be acquired by completing the event's main story. Enhance her via side maps to unlock additional servant coins, levels, and treasures.
steps
- Complete the event's main story to obtain Ruler Da Vinci.
- Utilize treasure maps and pseudo lottery nodes to earn coins for her enhancements.
Da Vinci offers niche benefits in high-difficulty nodes, particularly as a support for AoE attackers.
Command Codes in the Event
The rerun provides several new command codes:
If you acquired these during the original event run, duplicates will convert into mana or rare prisms.
Challenge Quest Strategy
The challenge quest revolves around a Kijyo Koyo boss with snowball mechanics.
Ensure your team includes AoE attackers and defensive tools to cope with increased aggression in later phases.

Kijyo Koyo appears as an enemy in the challenge quest battle. - Finotaisen
Also worth knowing
- Event Damage Bonuses: Summer Morgan and Summer Aesc benefit from special damage bonuses, making them excellent choices for this rerun's content.
- Limit Break Ocean Flyer: Achievable during this rerun, significantly boosting its utility for Arts attackers.
- No Blue Kama Skin: Blue Kama is only featured as a fight in the event and does not have an associated skin.
FAQ
How do I prepare for the Chaldea Summer Adventure rerun?
Assemble farming teams with Craft Essences like Sink Deeper and Ocean Flyer, prioritize the event ladder, and focus on pseudo lottery nodes to gather seashells and skill materials for servants.
What are the rewards for the Chaldea Summer Adventure event?
Rewards include Ruler Da Vinci, treasures from side maps, ascension items, skill materials like seashells, command codes, and crystallized lores.
How do I farm efficiently in Chaldea Summer Adventure?
Equip Sink Deeper to boost treasure chest drops, balance damage and efficiency setups, and leverage borrowed supports with event Craft Essences.
What is the strategy for the 90++ node in Chaldea Summer Adventure?
Focus on neutral or Berserker attackers to counter Sitonai's high health, use Ocean Flyer for damage boosts, and adapt AoE setups for wave inconsistencies.
Who are good servants for the Chaldea Summer Adventure challenge quest?
Good options include Astrea and Van Gogh for damage and utility, alongside defensive setups leveraging Castoria for stability during Kijyo's aggressive phases.
What command codes are available in Chaldea Summer Adventure?
The event offers Chiyogami Commander and Bestial Talisman, which provide utility like buff purges and curses for specific setups.
Sources
Screenshots on this page are frames from the videos below, used to illustrate the steps they describe. All rights remain with their creators.
- The Essential Guide to Chaldea Summer Adventure (Survey Rerun) | FGO Event Guide - Finotaisen, April 22, 2026
Related guides
- Continue with this related guide.


